Gorf is an early arcade shooter that feels like a poor relative to many of its peers of the time.
It borrows most of its features from other games (one wave is actually called “Galaxians” although I do believe that the developers properly licensed it from Namco) and doesn’t bring anything new to the table in terms of gameplay, but it did pioneer one thing. And that is: in the use of synthesised speech. Gorf was one of the earliest video games to use it (and although clear, it is quite robotic).
The King of Grabs 